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Norse— The construction of the proposed project is anticipated to result in short-term construction - related impacts to adjacent noise receivers (e.g., residences) based on the analyses included in the Final EIS/EIR (1990). However, it is anticipated that such impacts would be substantially mitigated with implementation of mitigation measure included in that document. However, the noise analysis performed in support of the Final EIS/EIR concludes the future -with -project noise levels within Phases 3 and 4 would approach or exceed pertinent standards (e.g., Caltrans Noise Abatement Criteria) and therefore potentially require abatement (e.g., soundwall). It is important to note that the noise analysis performed as part of the 1990 Final EIS/EIR did not include an analysis of the "reasonableness" of any potentially required noise abatement as further detailed in Caltrans' Traffic Noise Analysis Protocol (2006). Therefore, a Noise Study Report and Noise Abatement Decision Report will be necessary to take into account the passage of time (e.g., updating of regulations) and the updated traffic study to confirm any necessary abatement pursuant to current Caltrans and FHWA requirements. ➢ Air Quality— The construction of the proposed project is anticipated to result in short-term construction -related impacts to air quality. However, construction -related emissions are not anticipated to exceed pertinent South Coast Air Quality Management District thresholds. The CALINE3 modeling performed as part of the 1990 Final EIS/EIR indicates that carbon monoxide (CO) concentrations to address local air quality impacts for the intersections analyzed would not exceed state and federal Ambient Air Quality Standards. In fact, local and regional area air quality conditions (e.g., emissions of CO) are expected to improve with project implementation as a result of improved traffic movement through the corridor. Importantly, the air quality analyses performed as part of the 1990 Final EIS/EIR will need to be updated to address current regulatory and modeling requirements (e.g., use of URBEMIS2007 Version 9.2.4 emissions inventory model) to re -quantify criteria pollutant emissions. As further described below in Section C, an Air Quality Conformity Analysis report would be prepared to support the re-evaluation to satisfy Caltrans and FHWA reporting requirements. Further, and to specifically address the CEQA re-evaluation, a Climate Change/Greenhouse Gas Emissions Analysis will be performed taking into account the updated traffic study performed for this project. ➢ Cultural Resources — The 1990 Final EIS/EIR concludes that the project, including the limits of Phases 3 and 4, would not affect significant archaeological resources. The Final EIS/EIR also concludes that the limits of the project area of Phases 3 and 4 would not affect sites listed on the National Register, State Register, or Santa Ana Register. However, preliminary investigations indicate that there are 17 structures within the limits of Phase 3 and 33 structures within the limits of Phase 4 that are at least 45 years or older. Therefore, a Caltrans-compliant Historic Property Survey Report (HPSR) and Historic Resources Evaluation Report (HRER) will be prepared to provide a current assessment of potential impacts to historic resources. ➢ Hazardous Materials and Wastes— Given the passage of time, and due to the relatively substantial number of property acquisitions anticipated for the project, an Initial Site Assessment (ISA) Report will be prepared pursuant to Caltrans reporting requirements to characterize potential hazardous waste and materials contamination in the project area.